feat(campaign): expandable row process timeline

Each campaign row expands to a per-Run process timeline: on expand it fetches
GET /campaigns/{id}/timeline and places each child Run on the shared
WindowTimeline by accelerated window offset, coloured by run status, with
scenario/pass-rate/latency tooltips and click-through to the run report.
Running campaigns refresh on the existing 5s poll; terminal ones fetch once.
WindowTimeline gains a colorMap prop for semantic status colours. (v0.6 ticket 10)

frontend/web/src/components/WindowTimeline.tsx

@@ -20,6 +20,8 @@ export interface TimelineMarker {
 interface WindowTimelineProps {
   windowSeconds: number
   markers: TimelineMarker[]
+  /** colorKey → explicit colour; keys not present fall back to the auto palette. */
+  colorMap?: Record<string, string>
   /** colorKey → legend display name; falls back to the raw key. */
   colorLabels?: Record<string, string>
   showLegend?: boolean
@@ -40,11 +42,12 @@ function fmtTick(seconds: number): string {
 }
 
 export default function WindowTimeline({
-  windowSeconds, markers, colorLabels, showLegend = false, height = 64,
+  windowSeconds, markers, colorMap, colorLabels, showLegend = false, height = 64,
 }: WindowTimelineProps) {
   const window = windowSeconds > 0 ? windowSeconds : 1
   const uniqueKeys = Array.from(new Set(markers.map((m) => m.colorKey))).sort()
-  const colorOf = (key: string) => PALETTE[Math.max(0, uniqueKeys.indexOf(key)) % PALETTE.length]
+  const colorOf = (key: string) =>
+    colorMap?.[key] ?? PALETTE[Math.max(0, uniqueKeys.indexOf(key)) % PALETTE.length]
   const leftPct = (offset: number) => `${Math.min(1, Math.max(0, offset / window)) * 100}%`
 
   const ticks = Array.from({ length: TICK_COUNT + 1 }, (_, i) => i / TICK_COUNT)

frontend/web/src/pages/Campaigns.tsx

@@ -13,6 +13,7 @@ import PageWrapper from '../components/PageWrapper'
 import {
   campaignsApi, targetsApi, scenariosApi, runsApi,
   type CampaignListItem, type CampaignReport, type Target, type Scenario, type Run,
+  type CampaignTimelineEntry,
 } from '../api'
 import { passRateColor } from '../utils/colors'
 import { shortDateTime } from '../utils/date'
@@ -88,6 +89,9 @@ export default function CampaignsPage() {
   const [report, setReport] = useState<CampaignReport | null>(null)
   const [reportRuns, setReportRuns] = useState<Run[]>([])
 
+  const [expandedIds, setExpandedIds] = useState<string[]>([])
+  const [timelines, setTimelines] = useState<Record<string, CampaignTimelineEntry[]>>({})
+
   const targetName = (id: string) => targets.find((t) => t.id === id)?.name ?? id.slice(0, 8)
 
   const { data, loading, reload } = useResource<CampaignsListsData>(
@@ -171,6 +175,16 @@ export default function CampaignsPage() {
     reload()
   }
 
+  const fetchTimeline = async (campaignId: string) => {
+    const res = await campaignsApi.timeline(campaignId)
+    setTimelines((prev) => ({ ...prev, [campaignId]: res.data.entries }))
+  }
+
+  const onExpandRow = (expanded: boolean, record: CampaignListItem) => {
+    setExpandedIds((prev) => (expanded ? [...prev, record.id] : prev.filter((x) => x !== record.id)))
+    if (expanded) void fetchTimeline(record.id)
+  }
+
   const fetchReport = async (campaignId: string, silent = false) => {
     if (!silent) {
       setReportLoading(true)
@@ -205,6 +219,17 @@ export default function CampaignsPage() {
     activeKey === '/campaigns' && reportOpen && !!reportId && reportCampaignActive,
   )
 
+  // Grow the expanded timeline of any still-running campaign as new child Runs
+  // spawn. Completed/cancelled campaigns are fetched once on expand.
+  const activeExpandedIds = expandedIds.filter(
+    (id) => campaigns.some((c) => c.id === id && isActiveStatus(c.status)),
+  )
+  usePolling(
+    () => { activeExpandedIds.forEach((id) => void fetchTimeline(id)) },
+    POLL_INTERVAL_MS,
+    activeKey === '/campaigns' && activeExpandedIds.length > 0,
+  )
+
   const columns = [
     { title: '名称', dataIndex: 'name', key: 'name' },
     { title: '评测对象', key: 'target', render: (_: unknown, c: CampaignListItem) => targetName(c.target_id) },
@@ -337,6 +362,34 @@ export default function CampaignsPage() {
     },
   ]
 
+  const renderCampaignTimeline = (c: CampaignListItem) => {
+    const entries = timelines[c.id]
+    if (entries === undefined) return <Spin />
+    if (entries.length === 0) return <Empty description="暂无子运行" image={Empty.PRESENTED_IMAGE_SIMPLE} />
+    const markers: TimelineMarker[] = entries.map((e) => ({
+      key: e.run_id,
+      offsetSeconds: e.offset_seconds,
+      colorKey: e.status,
+      tooltip: (
+        <div style={{ fontSize: 12 }}>
+          <div>{e.scenario_name}</div>
+          <div>通过率：{fmtPct(e.pass_rate)}</div>
+          <div>时延：{e.avg_latency_ms == null ? '—' : `${Math.round(e.avg_latency_ms)}ms`}</div>
+        </div>
+      ),
+      onClick: () => navigate(`/reports?run=${e.run_id}`),
+    }))
+    return (
+      <WindowTimeline
+        windowSeconds={c.window_seconds}
+        markers={markers}
+        colorMap={statusColors}
+        colorLabels={statusLabels}
+        showLegend
+      />
+    )
+  }
+
   return (
     <PageWrapper
       title="评估活动"
@@ -357,6 +410,11 @@ export default function CampaignsPage() {
           dataSource={campaigns}
           columns={columns}
           pagination={false}
+          expandable={{
+            expandedRowKeys: expandedIds,
+            onExpand: onExpandRow,
+            expandedRowRender: renderCampaignTimeline,
+          }}
           locale={{ emptyText: <Empty description="还没有评估活动" /> }}
         />
       </div>